Toshiba DK8 manual INSTALLATION-DK 16 KSU & PCB -816-205 March, Pstu Installation Procedure

INSTALLATION-DK 16 KSU & PCB SECTION 100-816-205 MARCH 1993

SSTU SUBUNIT

50-PIN AMPHENOL CONNECTOR (FEMALE)

W1

H L

W1 Ring Voltage H = 190V P-P

L = 130V P-P (For PSTU1 (V.4) and PSTU2 only)

BACKPLANE CONNECTOR

FIGURE 5-15

PSTU AND SUBUNIT (SSTU)

TABLE 5-C

PSTU CONTROLS AND INTERFACE CONNECTORS

CONTROL/INDICATOR/
CONNECTOR	TYPE OF COMPONENT	DESCRIPTION
(Figure 5-15)
Ring Voltage W1 Jumper	Three-terminal jumper	Sets ring generator voltage level for all
Plug (PSTU1 (V.4 ) and		circuits.
PSTU2 only)		H = 190V P-P
		L = 130V P-P

NOTE:

PSTU1 (V.4) became available in November 1989. PSTU1(V.3) was discontinued.

9.12Set the PSTU1 (V.4) or PSTU2 ring generator level as required:

•W1 set to H (190V P-P).

•W1 set to L (130V P-P).

•Two ringers maximum per port (H or L).

9.13Unlike the PEKU or PESU, the PSTU does not have to be configured for BGM: There is no jumper wire to cut, etc.

9.20PSTU Installation Procedure

9.21Install the PSTU in accordance with the fol- lowing steps:

1) Remove the PCB from its protective packag- ing. The protective shield on the back of the PSTU is designed to protect the installer from

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